NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, all time — NPA 517
COMCAST IP PHONE, LLC 101
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2025-05-30 517-692-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SPRINGPORT MI
2024-09-24 517-426-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MUNITH MI
2024-09-24 517-628-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J ONONDAGA MI
2024-09-17 517-465-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J ALBION MI
2024-09-16 517-382-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LESLIE MI
2023-08-15 517-551-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J FOWLERVL MI
2023-07-28 517-365-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J WEBBERVL MI
2022-08-23 517-378-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J POTTERVL MI
2022-08-23 517-786-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CHARLOTTE MI
2019-10-03 517-666-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J GRANDLEDGE MI
2016-10-18 517-318-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J LANSING MI
2016-04-20 517-225-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J HOWELL MI
2016-04-06 517-220-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LANSING MI
2016-02-25 517-888-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J JACKSON MI
2016-02-03 517-220-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LANSING MI
2015-09-15 517-435-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J JACKSON MI
2015-07-20 517-836-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J EATON RPD MI
2015-07-02 517-539-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J JACKSON MI
2015-06-16 517-657-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LANSING MI
2015-06-03 517-657-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J LANSING MI
2015-04-03 517-539-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J JACKSON MI
2015-03-09 517-938-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BROOKLYN MI
2014-11-20 517-212-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J HILLSDALE MI
2014-09-05 517-657-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LANSING MI
2014-08-21 517-435-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J JACKSON MI
2014-05-13 517-796-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J JACKSON MI
2014-04-08 517-253-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J LANSING MI
2014-03-28 517-577-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J ADRIAN MI
2014-03-28 517-662-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J ADRIAN MI
2014-01-28 517-295-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HOWELL MI
2013-12-19 517-424-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J TECUMSEH MI
2013-12-19 517-731-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J GRANDLEDGE MI
2013-12-19 517-906-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J HOLT MI
2013-12-02 517-253-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J LANSING MI
2013-08-23 517-253-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J LANSING MI
2012-05-31 517-446-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J ONSTED MI
2012-05-23 517-483-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LANSING MI
2012-03-27 517-513-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J JACKSON MI
2012-02-21 517-513-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J JACKSON MI
2012-01-25 517-624-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J DE WITT MI
2011-11-09 517-575-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J LANSING MI
2011-08-29 517-315-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J JACKSON MI
2011-06-09 517-203-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J LANSING MI
2010-08-27 517-438-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J ADRIAN MI
2010-08-27 517-993-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J LANSING MI
2010-08-27 517-993-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J LANSING MI
2010-05-12 517-445-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CLAYTON MI
2009-12-11 517-395-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J JACKSON MI
2009-07-24 517-925-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J GRANDLEDGE MI
2008-11-21 517-569-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J RIVES JCT MI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.